• Structural Engineering and Mechanics
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• 제71권4호
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• pp.329-339
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• 2019

Assessment of failure probability, especially for a complex structure, requires a considerable number of calls to the numerical model. Reliability methods have been developed to decrease the computational time. In this approach, the original numerical model is replaced by a surrogate model which is usually explicit and much faster to evaluate. The current paper proposed an efficient reliability method based on Monte Carlo simulation (MCS) and multi-gene genetic programming (MGGP) as a robust variant of genetic programming (GP). GP has been applied in different fields; however, its application to structural reliability has not been tested. The current study investigated the performance of MGGP as a surrogate model in structural reliability problems and compares it with other surrogate models. An adaptive Metropolis algorithm is utilized to obtain the training data with which to build the MGGP model. The failure probability is estimated by combining MCS and MGGP. The efficiency and accuracy of the proposed method were investigated with the help of five numerical examples.

• 정보교육학회논문지
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• 제19권2호
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• pp.225-232
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• 2015

본 연구에서는 스크래치 프로그래밍 수업이 초등예비교사에게 미치는 영향을 컴퓨팅 사고력과 블룸의 텍사노미를 활용한 인지적 평가를 통해 확인하고자 하였다. 이를 위해 한 학기 동안 스크래치 프로그래밍 수업을 진행하고 예비교사의 객관적인 프로그래밍 능력을 평가하기 위해 인지적 평가 문항을 블룸의 텍사노미를 기반하여 측정하였다. 또한 초등예비교사들의 컴퓨팅 사고(Computational Thinking) 개념, 수행, 관점에 초점을 둔 설문을 실시하는 한편 팀프로젝트를 가지고 산출물 기반 인터뷰(Artifact-based Interview)를 실시하고 팀프로그래밍 경험을 정성적으로 분석하였다. 본 연구는 프로그래밍 수업을 통한 예비교사의 컴퓨팅 사고를 양적 및 질적으로 보다 포괄적으로 평가하였다는 점에서 의미가 있다. 또한 프로그래밍 능력을 블룸의 텍사노미 체계에 의해 객관적으로 평가해 봄으로써 향후 예비교사 프로그래밍 수업 설계에 대한 평가 측면의 시사점을 제시하고 있다.

• 컴퓨터교육학회논문지
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• 제20권3호
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• pp.1-11
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• 2017

본 연구는 문제 해결식 수업(PBL)을 대학교 컴퓨터 시스템프로그래밍 교육에 적용하고 이 수업이 학생들의 학업성취도와 직업기초능력에 어떤 영향을 미치는지 살펴보았다. 교과목 분석을 통해 과목을 크게 세 부분으로 나누고, 각 부분의 교육을 위해 한 문제씩을 출제하였다. 학업성취도에 미치는 영향을 측정하기 위해 2014년 학생들과의 성적을 비교하였고, 직업기초능력에 미치는 영향을 측정하기 위해서 한국직업능력개발원에서 주관중인 대학생 핵심역량진단시스템(K-CESA)를 활용하여 PBL 교육전과 후에 진단을 수행하였다. 분석 결과, 학업성취도와 직업기초능력 모두 유의미한 향상 효과가 있었다.

• International Journal of Computer Science & Network Security
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• 제22권2호
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• pp.91-100
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• 2022

To support early intervention, it is necessary to develop programming system tools that enable accurate, valid, and reliable assessments and can help achieve reasonable, generalizable, and measurable goals. This study examined the Assessment, Evaluation, and Programming System (AEPS) used by associations of children with disabilities in Saudi Arabia to assess its suitability for children with intellectual disabilities. A group of 16 specialists with different professional backgrounds (including special education, physiotherapy, occupational therapy, speech therapy and psychology) from 11 associations of children with disabilities took part in semi-structured personal interviews. The study concluded that AEPS is generally suited for use with children with intellectual disabilities. However, its suitability depends on the type and severity of the child's disability. The more severe the disability, the less effective the AEPS is likely to be. On the basis of this finding the researchers formed interdisciplinary teams to organise and integrate the children's learning and assess the benefits of AEPS, including its accuracy and ability to achieve adaptive, cognitive, and social targets, enhance family engagement and learning and develop basic development skills. This study also identified obstacles associated with the use of AEPS. These include the lack of comprehensiveness and accuracy of the goal, lack of precision and non-applicability to large movements and the fact that it cannot be used with all children with intellectual disabilities. In addition, the research showed that non-cooperation within the family is a major obstacle to the implementation of the AEPS. The results of this study have several implications.

• 한국컴퓨터정보학회논문지
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• 제29권5호
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• pp.203-211
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• 2024

프로그래밍 언어를 활용한 데이터 시각화는 처리하는 데이터 양, 처리 시간, 유연성에서 효율성과 효과성을 향상시킬 수 있으나 프로그래밍에 익숙해지기 위해 연습이 필요하다. 이에 본 연구에서는 프로그래밍 자동 평가 시스템에서 데이터 시각화를 연습하기 위한 공공데이터 기반 문제은행을 개발하였다. 공공데이터는 교육과정에서 제시한 주제로 수집하였으며 학습자가 데이터 시각화하기에 적절한 형태로 가공하였다. 문제는 다양한 데이터 시각화 방법을 학습하기 위해 수학교육과정과 연계하여 개발하였다. 개발한 문제는 전문가 검토 및 파일럿 테스트를 실시하였으며 문항의 수준, 데이터 시각화를 통한 수학 교육의 가능성을 확인하였다. 하지만 학생에게 흥미가 떨어지는 주제라는 의견을 받았으며 이를 보완하기 위해 학생이 중심이 되는 데이터를 활용하여 추가로 문항을 개발하였다. 개발한 문제 은행은 초등학교 정보영재 또는 중학교 이상에서 파이썬을 학습한 경험이 있는 학생이 데이터 시각화를 배울 때 활용될 수 있을 것으로 기대된다.

• 환경영향평가
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• 제18권6호
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• pp.367-376
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• 2009

This paper proposes an application methodology of AHP(Analytic Hierarchy Process) based decision making theory for improvement priority by assessment of various risk factors affecting on deterioration of water supply systems, as major social infrastructure. AHP method is organized with three level of hierarchy which is introduced for multi-criteria decision making in this study. In the first level, assessment outputs are calculated by AHP for each affecting factor. In the second level, criteria are estimated by using assessment results with respect to structural and environmental factors. Consequently, ranking decision is performed in the third level. In order to present the effectiveness, a proposed method is compared with FCP(Fuzzy Composite Programming) for decision making. Since the results of the proposed method show better performance with consistent results, it can be applied as an efficient information for the determination for improvement priority of the study infrastructure.

• 한국컴퓨터정보학회논문지
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• 제25권4호
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• pp.213-222
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• 2020

최근 소프트웨어 교육의 필요성에 대한 인식이 전 세계적으로 확산됨에 따라 우리나라도 정부 주도로 소프트웨어 의무 교육을 수행하고 있다. 대학에서의 소프트웨어 기초교육은 다양한 시행착오를 거쳐 안정화 되고는 있지만, 학생들의 비자발적 수강으로 인한 학습 동기 부족과 프로그래밍에 대한 높은 체감 난이도는 여전히 해결해야 할 문제로 남아 있다. 본 논문에서는 컴퓨팅 사고 역량 배양을 목적으로 문제 중심 프로그래밍 교과로 설계 및 운영된 컴퓨터과학 비전공 학생 대상 수업 사례를 수업 평가 결과를 이용해 비교하였다. 비교 결과, 문제의 용도를 문법 설명 보조재로 확대하고 전공 친화형 문제 비율을 확대 운영한 사례에서는 학습자들의 응답이 더 높은 점수에 집중되었고 응답 평균은 약 7% 향상되었다. 이는 학습자들이 느끼는 교과에 대한 체감 난도가 낮아졌음을 의미한다.

• 에너지공학
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• 제1권1호
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• pp.111-134
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• 1992

Energy system models have been broadly used for the solution of the assessment of technical and economical characteristics in the national energy systems. The purpose of this study is to overview the structures, potentials and usefulness of system models for energy technology assessment. The conventional models developed so far are not aquate to analyze the energy and environmental problems simultaneously. Energy system models integrated by multiobjective programming are also reviewed and discussed in this paper to judge their usefulness and applicability in simultaneously analyzing the energy and environmental problems.

• 농촌계획
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• 제18권4호
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• pp.13-26
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• 2012

The purpose of this study is to select the study area, which will be formed into Daegu Science Park as an national industrial complex, and to assess the landscape value based on biotop classification with different polygon forms, and to develop and computerize Biotop Value Assessment Tool (B-VAT) based on GIS. The result is as follows. First, according to the result of biotop classification based on an advanced analysis on preliminary data, a field study, and a literature review, total 13 biotop groups such as forrest biotop groups and total 63 biotop types were classified. Second, based on the advanced research on landscape value assessment model of biotop, we development biotop value assessment tool by using visual basic programming language on the ArcGIS. The first application result with B-VAT showed that the first grade was classified into 19 types including riverside forest(BE), the second grade 12 types including artificial plantation(ED), and the third class, the fourth grade, and the fifth grade 12 types, 2 types, and 18 types respectively. Also, according to the second evaluation result with above results, we divided a total number of 31 areas and 34 areas, which had special meaning for landscape conservation(1a, 1b) and which had meaning for landscape conservation(2a, 2b, 2c). As such, biotop type classification and an landscape value evaluation, both of which were suggested from the result of the study, will help to scientifically understand a landscape value for a target land before undertaking reckless development. And it will serve to provide important preliminary data aimed to overcome damaged landscape due to developed and to manage a landscape planning in the future. In particular, we expect that B-VAT based on GIS will help overcome the limitations of applicability for of current value evaluation models, which are based on complicated algorithms, and will be a great contribution to an increase in convenience and popularity. In addition, this will save time and improve the accuracy for hand-counting. However, this study limited to aesthetic-visual part in biotop assessment. Therefore, it is certain that in the future research comprehensive assessment should be conducted with conservation and recreation view.

• 한국환경과학회지
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• 제15권4호
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• pp.319-324
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• 2006

Release rate is one of the important items for the environmental impact assessment caused by radioactive materials in case of an accidental release from the nuclear facilities. In this study, the uncertainty of the estimated release rate is evaluated using Monte Carlo method. Gaussian plume model and linear programming are used for estimating the release rate of a source material. Tracer experiment is performed at the Yeoung-Kwang nuclear site to understand the dispersion characteristics. The optimized release rate was 1.56 times rather than the released source as a result of the linear programming to minimize the sum of square errors between the observed concentrations of the experiment and the calculated ones using Gaussian plume model. In the mean time, 95% confidence interval of the estimated release rate was from 1.41 to 2.53 times compared with the released rate as a result of the Monte Carlo simulation considering input variations of the Gaussian plume model. We confirm that this kind of the uncertainty evaluation for the source rate can support decision making appropriately in case of the radiological emergencies.